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Re: honda D16A8 engine valve clearances and procedure
EGR stands for Exhaust Gas Recirculation. The EGR valve re-circulates carbon dioxide from your vehicle's exhaust back through your engine. EGR valve symptoms are as of: experiencing reduced power, detonation (pinging), rough idle, or stalling and hesitation when accelerating. Inspecting and cleaning EGR valves is easy. First, know how to clean an EGR valve, it will save you the cost of a replacement EGR valve. But if the EGR valve is going bad, performing an EGR valve install is simple. Talk to yourParts Pro at a PartSource near you for more information. How to clean EGR valve passages? Do-It-Yourself & Save!
First, locate EGR valve. Place the vehicle in park. Apply the emergency brake. Start the vehicle. Allow to warm up.
Find the EGR plunger mechanism. The EGR valve plunger meters the exhaust gas honda D16A8 engine valve clearances and procedure - bt-step3.gifn by opening and closing.
Manually rev the engine and check for plunger operation. A plunger stuck open or closed indicates EGR valve problems. Replace the bad EGR valve
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there is no specification for what you want
the valve clearance is between the end of the rocker arm and the end if the valve stem
the stem end is proud of the spring retainer so if your rocker arm is touching the spring retainer , you have a big problem as for the procedure it is set out in the workshop manual but if you don't have a manual it can be done like this
you will need the firing order of the engine first
now adjust no 1 piston valves when the next piston to fire has the valves in the rock position
that is the exhaust valve just closing as the inlet is just opening a bit of movement of the crank makes either valve move up or down
adjust no 1 piston valves
now move on to the next piston to fire and adjust the valves that were rocking
follow that procedure until all the valves are adjusted
on a 4 cylinder engine with a firing order of 1--3--4--2
bring up no 1 piston and adjust the valves when the valves on no 3 piston are rocking
next piston to fire is no 4 so adjust no 2 piston valves
next piston to fire is no 2 so adjust the valves when no 1 valves are rocking
the procedure is the same for engines with any number of cylinders
There is a specific procedure for setting valve clearance . I highly recommend getting a repair manual for the correct specs & procedure. The engine must be at TDC with the #1 cylinder on the compression stroke , that will allow you to adjust ONLY certain valves , then you have to turn the engine one turn to TDC again only now #1 will be on the exhaust stroke & the rest of the valves can be adjusted . it's important that you know the difference between the two !
for adjusting the valves look for a sticker under the hood with valve clearance specs or a service manual.You will need appropriate feeler gauges and a 10mm wrench and a flat tip screw driver.If the car is a 4cylinder the cam gear will have 4 notches on it they represent watch cylinder to adjust if it is a six cylinder the front cam will have notches on it with numbers on it you adjust the valves of the cylinder number that is lined up with the timing marks.I recommend using a vernier caliper and setting it to the correct clearance that the valves are supposed to be set to and drag the feeler gauge through it so you can get use to what the correct clearance feels like on the feeler gauge.If you have never done this I would take it to a good shop because this does take some skill and drivability problems can occur if done incorrectly.Good Luck!